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公开(公告)号：US09866772B2
公开(公告)日：2018-01-09
申请号：US14968117
申请日：2015-12-14
Applicant: Axis AB
Inventor： Henning Gredegard , Bjorn Ardo , Dawid Studzinski
CPC classification number: H04N5/357 , G06T3/0018 , G06T5/006 , H04N5/217 , H04N5/23296 , H04N5/2628 , H04N5/3572 , H04N5/772
Abstract: A method for correcting and presenting a barrel distorted image is disclosed. In the method an output image is created having a user-defined aspect ratio (AR), and the method comprises acquiring a continuous flow of barrel distorted images in a video camera and processing the image in an image processing unit. The processed image is added as an output image to an image stream, and the actual processing includes applying a barrel distortion correction so as to form a corrected image having a smallest width (w′) and a smallest height (h′), and generating the output image by cropping the corrected image to a height exceeding or equaling the smallest height (h′) and having the user-defined aspect ratio (AR).
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公开(公告)号：US09756274B2
公开(公告)日：2017-09-05
申请号：US14956519
申请日：2015-12-02
Applicant: Axis AB
Inventor： Bjorn Ardo , Song Yuan
CPC classification number: H04N5/44504 , G06T7/20 , G06T13/80 , G06T2207/10016 , H04N5/265 , H04N21/4312
Abstract: The present invention relates generally to video communication systems, and more specifically to a method and device for determining a degree of animation of a graphical overlay for a video stream based on a degree of movement in the video stream.
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13.发明申请公开(公告)号：US20200186822A1
公开(公告)日：2020-06-11
申请号：US16708338
申请日：2019-12-09
Applicant: Axis AB
Inventor： Bjorn Ardo
IPC: H04N19/517 , H04N19/119 , H04N19/139 , H04N19/172
Abstract: A method and device for encoding a plurality of image frames uses two separate encoders, where each image frame is divided into two portions to each be encoded by one of the two encoders, where the image frame is divided to minimize motion across the boundary between the two portions, such that the two encoders may operate independently of each other without a substantial bit rate penalty or reduced encoding quality.
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Patent Agency Ranking
公开(公告)号：US10580121B2
公开(公告)日：2020-03-03
申请号：US15815168
申请日：2017-11-16
Applicant: Axis AB
Inventor： Bjorn Ardo , Johan Nystrom
Abstract: A method and apparatus are disclosed. The method may include determining a current zoom value of a camera and determining a first modulation transfer function of a transparent dome of the camera. The method may include applying a first low-pass filter to an image captured by the camera based on the current zoom value and the first modulation transfer function of the transparent dome.
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公开(公告)号：US20190147574A1
公开(公告)日：2019-05-16
申请号：US15815168
申请日：2017-11-16
Applicant: Axis AB
Inventor： Bjorn Ardo , Johan Nystrom
Abstract: A method and apparatus are disclosed. The method may include determining a current zoom value of a camera and determining a first modulation transfer function of a transparent dome of the camera. The method may include applying a first low-pass filter to an image captured by the camera based on the current zoom value and the first modulation transfer function of the transparent dome.
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公开(公告)号：US20180191952A1
公开(公告)日：2018-07-05
申请号：US15395893
申请日：2016-12-30
Applicant: Axis AB
Inventor： Bjorn Ardo , Fredrik Pihl
CPC classification number: H04N5/23219 , G06F3/013 , G06K9/00604 , H04N5/23229 , H04N5/23293 , H04N21/2187 , H04N21/2662 , H04N21/4223 , H04N21/44218
Abstract: A method and a video management system is disclosed. The method may include receiving a video stream from a camera and displaying the video stream on a display. The method may include obtaining, via an eye tracking sensor, gaze information for an operator watching the display. The method may include generating a historical gaze heat map for the video stream for a time period based on the obtained gaze information and determining a low interest area for the video stream based on the generated historical gaze heat map. The method may include instructing the camera to decrease a bit rate of the video stream in the low interest area.
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17.发明申请METHOD AND DEVICE FOR DETERMINING PROPERTIES OF A GRAPHICAL OVERLAY FOR A VIDEO STREAM 审中-公开用于确定视频流的图形覆盖特性的方法和装置公开(公告)号：US20160165271A1
公开(公告)日：2016-06-09
申请号：US14958304
申请日：2015-12-03
Applicant: Axis AB
Inventor： Bjorn Ardo , Song Yuan
IPC: H04N21/234 , H04N21/24 , H04N21/242 , G06T7/20 , G06T7/40 , G06K9/46 , G06T7/00 , H04N21/61 , G06K9/62
CPC classification number: H04N21/23424 , G06K9/4652 , G06K9/4661 , G06K9/6215 , G06T7/20 , G06T7/73 , G06T7/90 , H04N21/23418 , H04N21/2402 , H04N21/242 , H04N21/4312 , H04N21/6125
Abstract: The present invention relates generally to video communication systems, and more specifically to a method and device for adjusting properties of a graphical overlay for a video stream, the adjusted properties being at least one of a position, a degree of animation and a color composition of the graphical overlay and the adjustment is based on a scene depicted by the time period of the video stream. The adjustment is performed if an estimated bitrate for transmitting an encoded bitstream comprising the time period of the video stream and the graphical overlay exceeds a predetermined upper threshold bitrate for transmitting an encoded single bitstream comprising the time period of the video stream and the graphical overlay.
Abstract translation: 本发明一般涉及视频通信系统，更具体地，涉及一种用于调整视频流的图形覆盖的属性的方法和装置，所调整的属性是以下各项中的至少一个：动画的位置，程度和颜色组合 图形叠加和调整基于由视频流的时间段描绘的场景。 如果用于发送包括视频流的时间段和图形叠加层的编码比特流的估计比特率超过预定的上限阈值比特率，则用于发送包括视频流的时间段和图形叠加的编码单个比特流的估计比特率被执行。
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公开(公告)号：US20160165171A1
公开(公告)日：2016-06-09
申请号：US14956519
申请日：2015-12-02
Applicant: Axis AB
Inventor： Bjorn Ardo , Song Yuan
CPC classification number: H04N5/44504 , G06T7/20 , G06T13/80 , G06T2207/10016 , H04N5/265 , H04N21/4312
Abstract: The present invention relates generally to video communication systems, and more specifically to a method and device for determining a degree of animation of a graphical overlay for a video stream based on a degree of movement in the video stream.
Abstract translation: 本发明一般涉及视频通信系统，更具体地涉及一种用于基于视频流中的移动程度来确定用于视频流的图形叠加的动画程度的方法和装置。
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